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Autor/inn/enOllino, Mario; Aldoney, Jenny; Domínguez, Ana M.; Merino, Cristian
TitelA New Multimedia Application for Teaching and Learning Chemical Equilibrium
QuelleIn: Chemistry Education Research and Practice, 19 (2018) 1, S.364-374 (11 Seiten)Infoseite zur Zeitschrift
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ZusatzinformationORCID (Ollino, Mario)
ORCID (Aldoney, Jenny)
ORCID (Domínguez, Ana M.)
ORCID (Merino, Cristian)
Spracheenglisch
Dokumenttypgedruckt; online; Zeitschriftenaufsatz
ISSN1756-1108
DOI10.1039/c7rp00113d
SchlagwörterChemistry; Scientific Concepts; Science Instruction; Pretests Posttests; Animation; College Students; College Science; Quasiexperimental Design; Control Groups; Experimental Groups; Science Teachers; Multimedia Instruction; Teaching Methods; Foreign Countries; Chile
AbstractThis study presents a method for teaching the subject of chemical equilibrium in which students engage in self-learning mediated by the use of a new multimedia animation (SEQ-alfa©). This method is presented together with evidence supporting its advantages. At a microscopic level, the simulator shows the mutual transformation of A molecules into B molecules and vice versa for the reversible one-step chemical reaction, A(g) [double arrow] B(g). The user defines the reaction as endothermic or exothermic and sets a given reaction temperature; SEQ-alfa© then calculates the kinetic constants of the forward and reverse reactions. Based on initial given concentrations, the animation then evaluates the respective rates and concentrations, as well as the concentration quotient value, as the reaction progresses towards its equilibrium state. SEQ-alfa© also demonstrates the effects of concentration and temperature alterations on the reaction's progress and the value of the reaction quotient until equilibrium is reached, thus giving the equilibrium constant. In addition, a validation of this new approach was carried out with 27 teachers. A pre-test and post-test of students' understanding of the basic concepts of chemical equilibrium were conducted. Tested groups attained a 50% average learning gain (n[subscript exp] = 130, n[subscript ctrl] = 26). Those students with little or no previous knowledge acquired a better understanding of chemical equilibrium. In addition, 80% of teachers agreed that the multimedia resource and its complementary activities had positive effects. (As Provided).
AnmerkungenRoyal Society of Chemistry. Thomas Graham House, Science Park, Milton Road, Cambridge, CB4 0WF, UK. Tel: +44-1223 420066; Fax: +44-1223 423623; e-mail: cerp@rsc.org; Web site: http://www.rsc.org/cerp
Erfasst vonERIC (Education Resources Information Center), Washington, DC
Update2020/1/01
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